Name: …………………………………………………………… Adm no ……..….......... Class.................
231/1
BIOLOGY FORM TWO
CAT II
FEB/MARCH 2025
TIME: 40 MINUTES
INSTRUCTIONS TO CANDIDATES:
Answer ALL the questions
Answers should be written in the spaces provided
1. Which organelle would be abundant in: (2mks)
a. Skeletal muscle tissue
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b. Palisade cell
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2. Name the disease caused by lack of the following in the human diet: (2mks)
a. Vitamin D…………………………………………………………………………..
b. Iodine……………………………………………………………………………….
3. The following is a dental formula of a certain mammal
I 0/3 C0/1 Pm 3/3 M3/3
a. State the likely mode of feeding for the mammal. (1mk)
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b. Give a reason for your answer. (1mk)
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4. State two functions of saliva in mammalian digestion. (2mks)
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5. Name the tissues in plants responsible for:
a. Transport of water and mineral salts. (1mk)
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b. Translocation of carbohydrates. ……………………………………… (1mk)
6. A student carried out an experiment to determine a certain process in plants. He
removed the bark of a dicotyledonous tree in diagram A and appeared as in diagram B
after two months.
a. What was the aim of the experiment? (1mk)
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b. Name the tissue that was removed. (1mk)
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c. The ringed tree finally died. Explain the cause of death. (2mks)
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7. Differentiate between single and double circulation. (2mks)
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8. State two structural differences between arteries and veins. (2mks)
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9. Name the disease that causes thickening and hardening of arteries. (1mk)
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10. What prevents blood in veins from flowing backwards. (1mk)
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11. State two functions of blood other than transport. (2mks)
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12. The diagram below represent parts of a mammalian heart. (3mks)
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a. Name parts:
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b. Explain why chamber B has thicker muscular wall than chamber C. (2mks)
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13. State two adaptations of red blood cells to their functions. (2mks)
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14. Name the type of immunity produced when antibodies from the mother are passed
to the foetus during breastfeeding. (1mk)
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